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Finding the Fourth Proportional to 861.33, 1,292.06 and 374.29

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Solution

The fourth proportional to 861.33, 1,292.06 and 374.29 is: 561.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    861.33 : 1,292.06 = 374.29 : x
  2. Step 2: Convert to fraction form
    861.33/1,292.06 = 374.29/x
  3. Step 3: Cross multiply
    861.33x = 1,292.06 × 374.29
  4. Step 4: Simplify right side
    861.33x = 483,605.14
  5. Step 5: Solve for x
    x = 483,605.14/861.33
  6. Step 6: Final answer
    x = 561.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.